FormatTimestamp returns timestamp format based on layout.

Now returns t as a Unix time, the number of millisecond elapsed since January 1, 1970 UTC.

NowNano returns t as a unix time, the number of nanoseconds elapsed.

ParseTimestamp parses timestamp str value based on layout using local zone.

OneDay is the number of millisecond for a day.

OneHour is the number of millisecond for an hour.

OneMinute is the number of millisecond for a minute.

OneMonth is the number of millisecond for a month.

OneSecond is the number of millisecond for a second.

OneWeek is the number of millisecond for a week.

OneYear is the number of millisecond for a year.